SessionBar

QuantConnect.Data.Market.SessionBar

SessionBar()

SessionBar(source_tick_type: TickType)

Bases: TradeBar

Contains OHLCV data for a single session

Signature descriptions:

• Initializes a new instance of SessionBar with default values

• Initializes a new instance of SessionBar with a specific tick type

open_interest

open_interest: float

Open Interest:

open

open: float

Opening price of the bar: Defined as the price at the start of the time period.

high

high: float

High price of the TradeBar during the time period.

low

low: float

Low price of the TradeBar during the time period.

close

close: float

Closing price of the TradeBar. Defined as the price at Start Time + TimeSpan.

period

period: timedelta

The period of this session bar

symbol

symbol: Symbol

Symbol representation for underlying Security

data_type

data_type: MarketDataType

Market Data Type of this data - does it come in individual price packets or is it grouped into OHLC.

time

time: datetime

Current time marker of this data packet.

end_time

end_time: datetime

The closing time of this bar, computed via the Time and Period

value

value: float

Value representation of this data packet. All data requires a representative value for this moment in time. For streams of data this is the price now, for OHLC packets this is the closing price.

price

price: float

As this is a backtesting platform we'll provide an alias of value as price.

ALL_RESOLUTIONS

ALL_RESOLUTIONS: List[Resolution] = ...

A list of all Resolution

This codeEntityType is protected.

DAILY_RESOLUTION

DAILY_RESOLUTION: List[Resolution] = ...

A list of Resolution.DAILY

This codeEntityType is protected.

MINUTE_RESOLUTION

MINUTE_RESOLUTION: List[Resolution] = ...

A list of Resolution.MINUTE

This codeEntityType is protected.

HIGH_RESOLUTION

HIGH_RESOLUTION: List[Resolution] = ...

A list of high Resolution, including minute, second, and tick.

This codeEntityType is protected.

OPTION_RESOLUTIONS

OPTION_RESOLUTIONS: List[Resolution] = ...

A list of resolutions support by Options

This codeEntityType is protected.

is_fill_forward

is_fill_forward: bool

True if this is a fill forward piece of data

initialized

initialized: int

This codeEntityType is protected.

volume

volume: float

Volume:

to_string

to_string() -> str

Returns a string representation of the session bar with OHLCV and OpenInterest values formatted. Example: "O: 101.00 H: 112.00 L: 95.00 C: 110.00 V: 1005.00 OI: 12"

update

update(data: BaseData, consolidated: IBaseData) -> None

Updates the session bar with new market data and initializes the first bar if needed

Parameters:

Name	Type	Description	Default
data	BaseData	The new data to update the session with	required
consolidated	IBaseData	The current consolidated session bar	required

clone

clone(fill_forward: bool) -> BaseData

clone() -> BaseData

Signature descriptions:

• Return a new instance clone of this object, used in fill forward

• Return a new instance clone of this object

Parameters:

Name	Type	Description	Default
fill_forward	Optional[bool]	True if this is a fill forward clone	None

Returns:

Type	Description
BaseData	A clone of the current object.

reader

reader(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
    is_live_mode: bool,
) -> BaseData

TradeBar Reader: Fetch the data from the QC storage and feed it line by line into the engine.

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	str	Line from the data file requested	required
date	datetime	Date of this reader request	required
is_live_mode	bool	true if we're in live mode, false for backtesting mode	required

Returns:

Type	Description
BaseData	Enumerable iterator for returning each line of the required data.

requires_mapping

requires_mapping() -> bool

Indicates if there is support for mapping

Returns:

Type	Description
bool	True indicates mapping should be used.

data_time_zone

data_time_zone() -> Any

Specifies the data time zone for this data type. This is useful for custom data types

Returns:

Type	Description
Any	The DateTimeZone of this data type.

default_resolution

default_resolution() -> Resolution

Gets the default resolution for this data and security type

deserialize_message

deserialize_message(serialized: str) -> Iterable[BaseData]

Deserialize the message from the data server

Parameters:

Name	Type	Description	Default
serialized	str	The data server's message	required

Returns:

Type	Description
Iterable[BaseData]	An enumerable of base data, if unsuccessful, returns an empty enumerable.

get_source

get_source(
    config: SubscriptionDataConfig,
    date: datetime,
    is_live_mode: bool,
) -> SubscriptionDataSource

Get Source for Custom Data File

What source file location would you prefer for each type of usage:

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Configuration object	required
date	datetime	Date of this source request if source spread across multiple files	required
is_live_mode	bool	true if we're in live mode, false for backtesting mode	required

Returns:

Type	Description
SubscriptionDataSource	String source location of the file.

is_sparse_data

is_sparse_data() -> bool

Indicates that the data set is expected to be sparse

Returns:

Type	Description
bool	True if the data set represented by this type is expected to be sparse.

should_cache_to_security

should_cache_to_security() -> bool

Indicates whether this contains data that should be stored in the security cache

Returns:

Type	Description
bool	Whether this contains data that should be stored in the security cache.

supported_resolutions

supported_resolutions() -> List[Resolution]

Gets the supported resolution for this data and security type

update_ask

update_ask(ask_price: float, ask_size: float) -> None

Updates this base data with the new quote ask information

Parameters:

Name	Type	Description	Default
ask_price	float	The current ask price	required
ask_size	float	The current ask size	required

update_bid

update_bid(bid_price: float, bid_size: float) -> None

Updates this base data with the new quote bid information

Parameters:

Name	Type	Description	Default
bid_price	float	The current bid price	required
bid_size	float	The current bid size	required

update_quote

update_quote(
    bid_price: float,
    bid_size: float,
    ask_price: float,
    ask_size: float,
) -> None

Updates this base data with new quote information

Parameters:

Name	Type	Description	Default
bid_price	float	The current bid price	required
bid_size	float	The current bid size	required
ask_price	float	The current ask price	required
ask_size	float	The current ask size	required

update_trade

update_trade(last_trade: float, trade_size: float) -> None

Updates this base data with a new trade

Parameters:

Name	Type	Description	Default
last_trade	float	The price of the last trade	required
trade_size	float	The quantity traded	required

parse_cfd

parse_cfd(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_cfd(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parses CFD trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	Optional[str]	Line from the data file requested	None
date	datetime	The base data used to compute the time of the bar since the line specifies a milliseconds since midnight	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None

parse_crypto

parse_crypto(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_crypto(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parses crypto trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	Optional[str]	Line from the data file requested	None
date	datetime	The base data used to compute the time of the bar since the line specifies a milliseconds since midnight	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None

parse_equity

parse_equity(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

parse_equity(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

Parses equity trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None
date	datetime	Date of this reader request	required
line	Optional[str]	Line from the data file requested	None

parse_forex

parse_forex(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_forex(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parses forex trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	Optional[str]	Line from the data file requested	None
date	datetime	The base data used to compute the time of the bar since the line specifies a milliseconds since midnight	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None

parse_future

parse_future(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_future(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parses Future trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	Optional[str]	Line from the data file requested	None
date	datetime	The base data used to compute the time of the bar since the line specifies a milliseconds since midnight	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None

parse_index

parse_index(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_index(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parse an index bar from the LEAN disk format

parse_option

parse_option(
    config: SubscriptionDataConfig,
    line: str,
    date: datetime,
) -> TradeBar

parse_option(
    config: SubscriptionDataConfig,
    stream_reader: StreamReader,
    date: datetime,
) -> TradeBar

Parses Option trade bar data into the specified tradebar type, useful for custom types with OHLCV data deriving from TradeBar

Parameters:

Name	Type	Description	Default
config	SubscriptionDataConfig	Symbols, Resolution, DataType,	required
line	Optional[str]	Line from the data file requested	None
date	datetime	The base data used to compute the time of the bar since the line specifies a milliseconds since midnight	required
stream_reader	Optional[StreamReader]	The data stream of the requested file	None

parse

parse(
    config: SubscriptionDataConfig,
    line: str,
    base_date: datetime,
) -> TradeBar

Parses the trade bar data line assuming QC data formats